RU2689704C1 - Structure for supply of fluid medium to guide tire of chain saw - Google Patents

Abstract

FIELD: woodworking industry.SUBSTANCE: group of inventions relates to the woodworking industry, in particular to chain saws. Group of inventions includes design for supply of fluid medium to guide tire of chain saw, containing channel device, passing from housing of chain saw to fastening structure. Direction of the longitudinal axis of the channel means coincides with the direction of action of the transfer element. Channel device comprises a cavity extending through the entire device. First end of the channel facility is made with possibility of connection with the supply channel provided in the chain saw body. Second end of the channel facility is made with possibility of connection with the response channel provided in the fastening structure. Response channel passes before connection with guide bus. Chain saw for logging machine is equipped with structure for supply of fluid medium to guide tire. Forest machine comprises structure for supply of fluid medium to guide tire of chain saw of harvester head.EFFECT: reduced loss of lubricating oil.14 cl, 8 dwg

Description

The level of technology

[0001] the Present invention relates to the design, as claimed in the restrictive part of paragraph 1 of the formula. The solution considered here is particularly suitable for lubricating the chain of the sawing mechanism, and more specifically, for devices for lubricating the chains of the sawing mechanisms of forest machines.

[0002] Logging machines are used for felling and thinning trees as well as pruning. The cutting and cutting of a tree is carried out, as a rule, by means of a sawing mechanism, a chain saw, provided for in the harvester head of a logging machine. Consequently, it is the sawing mechanism that is one of the most important nodes in terms of operating efficiency and profitability of a logging machine.

[0003] When felling and cutting trees, the saw chain and chain saw guide tire contact each other when the saw chain moves along the rail of the outer edge of the guide tire. To reduce friction and wear caused by sawing and moving processes, a lubricant is supplied to the saw chain and guide rail. When moving the saw chain, the lubricant spreads all over the guide rail, including the end sprocket in it.

[0004] In chain saws of the type described above, automatic chain tensioners are also used. Tensioning the saw chain is required because it is drawn out during operation due to, among other things, heat and dynamic factors.

[0005] The chain tensioner moves the guide bar in the direction of its longitudinal axis, as a result of which the saw chain is tensioned as the distance between the guide bar and the chain sprocket increases. Similarly, when the sawing process is interrupted or terminated, the tensioner stops tensioning the saw chain.

[0006] Given the rather complex mechanics of chain saws, the direction of lubrication to the guide rail presents certain difficulties. However, various designs are known for directing lubricant to the saw chain through the movable components of the tensioner and the fasteners of the guide rail. One example of a device for lubricating sawing machines for logging machines is given in FI 124810, “Lubricating Device for a Sawing Mechanism”. This publication describes a lubricating device for a sawing mechanism with a lubricant container and a lubricating pump having a pumping chamber. The pump described in this source has a first space and a second space for supplying lubricant to the saw chain of the saw mechanism through the second channel, and the volume of the second space is less than the volume of the first space. A pressure pump delivers lubrication through the channel to the saw chain.

[0007] in Addition, from the publication FI 20106125 known design, used for lubrication of the saw chain with greases. In this design, tubes are used, with the grease being fed under pressure from the tank to the metering unit, from where it is fed further along the tubes to the saw chain.

[0008] Another of the known technical solutions is that the path of passage of lubricating oil is formed by opposite supply channels that are provided between surfaces moving in the process of tensioning the saw chain. The gap between the supply channels is sealed with an o-ring placed in an oval groove on the surface, and the channel for the passage of lubricating oil goes through the middle of the ring seal.

[0009] However, when using the known solutions, a number of problems arise. Given the special design of the saw chain, the channels for lubrication, and in particular their passageways, are difficult to seal. Therefore, in chain saws of logging machines there is a constant loss of significant amounts of lubricating oil, which causes both environmental and financial problems.

Summary of the Invention

[0010] Thus, one of the objectives of the invention is to develop a design that would allow to achieve a solution to the above problems in general. This goal is achieved thanks to the design for supplying fluid to the guide tire of the chain saw, which has, in accordance with the present invention, the distinguishing features stated in the claims.

[0011] The existing problems can be solved, in particular, by combining the features set forth in the characterizing part of Claim 1. As for the preferred embodiments, they are set forth in dependent clauses.

[0012] The invention is based on the principle that the supply of lubricant or some other liquid medium to the saw chain can be organized by means of a hollow channel means moving simultaneously with the movement, a guide rail at which it is tensioned. The considered device provides special benefits when sealing a cylindrical channel made in the body of the saw mechanism. As a result, it is possible to prevent the occurrence of a problem inherent in the known solutions, in which an attempt is made to seal the channel formed by the opposite flat surfaces that are sliding relative to each other.

[0013] the Invention provides a number of tangible benefits. Thus, by providing a conductive channel in a channel formed in the above-described channel means, while the channel means form a slidable connection between the chain saw body and the mounting rail of the guide rail, it becomes possible to supply lubricant or some other liquid medium to the guide rail while ensuring sealing at the same time as the movement corresponding to the tension to which the tire is subjected.

[0014] the Proposed solution allows you to get a real pass way, which is more impermeable and insensitive to the gaps during the sliding movement of the guide rail and related parts.

[0015] In addition, the proposed design is simple to manufacture, because the hermetic attachment of the channel means to the structures in which it is placed is easier and more reliable than using known technical solutions.

[0016] The solution considered here also provides the possibility of a longer sliding movement of the guide rail than it was before, without compromising the tightness of the channel leading from the chain saw body to the guide rail.

[0017] Compared with the previous solutions, the maintenance of the channel means according to the invention is noticeably easier because such a design does not require disassembling the sliding mechanisms of the chain tensioning device, for example, to replace seals.

[0018] The remaining advantages of the invention are described in more detail below during the consideration of specific embodiments of the invention.

List of drawings

[19] The following is a more detailed explanation of some preferred embodiments of the invention with reference to the attached drawings, where:

FIG. 1 is a schematic representation of a harvester head logging machine;

FIG. 2 illustrates a harvester head used in a logging machine with a chain saw;

FIG. 3 is a perspective view of a chainsaw used in a harvester head;

FIG. 4 is an exploded view of the chain saw of FIG. 3;

FIG. 5 illustrates a detailed view of the chain saw of FIG. 3 and 4;

FIG. 6 is a cross-section along line A-A in FIG. 3;

FIG. 7 is a detailed sectional view along the line B-B in FIG. 6;

FIG. 8 is an alternative detailed sectional view along the line B-B in FIG. 6

A detailed description of the preferred embodiments

[0020] In the drawings presented here, the design for supplying fluid to the chain saw guide bus is illustrated not to scale, but only schematically, with a demonstration of the overall structure and operation of structures according to preferred embodiments, with the structural components indicated in the attached drawings with digital numbers, correspond to the components indicated by the digital positions in this description.

[0021] The considered design is an implementation of a technical solution, according to which fluid in various states (gaseous, liquid or solid) can be supplied, for example, through the body of the chain saw 3 located in the harvester head 2 of the harvesting machine 1 of FIG. , to the guide tire of the chain saw, or to the area in its immediate vicinity.

[0022] Below, the proposed solution is considered more specifically in a situation where lubricant is supplied to the saw chain 5 moving along the guide tire 4 of the chain saw 3 located in the harvester head 2 of FIG. 2. However, the proposed solution is not limited to the specified technical field, and can be applied in a wide variety of situations for the supply of any substance other than conventional lubrication.

[0023] The essential features of the device in question are clear from consideration, in particular, FIG. 3, 4, 5 and 6. These drawings show a chain saw 3, which includes a power unit 6, designed to actuate the chain sprocket 7. This chain sprocket, in turn, drives the saw chain moving along the guide rail . Separately, the saw chain is not illustrated in the drawings. In general, the chainsaw components, like the well-known components mentioned above, are not described in more detail here, since the specialists in this field are well acquainted with them.

[0024] The guide rail 4 is rotatably mounted to the chain saw body 8 by means of a fixing structure 9 mounted substantially fixedly on the guide rail. In addition, there is a tension device made with the possibility of such an impact on the mounting structure of the guide rail, which ensures the movement of the guide rail in the direction of its longitudinal axis. Separately, the tension device is not illustrated in the drawings. Forward movement is made possible by the sliding mechanism 10a and 10b, which usually also serves to attach the fastening structure to the chain saw body 8. In the process of further moving the guide rail outward relative to the chain sprocket 7 in the direction of its longitudinal axis, that is, in the position shown in the drawings, from left to right, the saw chain, the tension of which weakened during the sawing process, can be pulled back on the guide bar.

[0025] Such a tensioning device comprises at least one transfer element 11 located on the chain saw body 8 and causing movement essentially in the direction of the longitudinal axis of the guide rail 4. This transfer element can be seen in FIG. 5 behind the slide mechanism 10a. Providing the possibility of the contact of the transfer element with the counter surface 12 located on the guide rail or its mounting structure 9, and directing the force to this counter surface, it is possible to cause the guide rail to move in the direction of its longitudinal axis. The transmission element may be formed, for example, by a piston-cylinder mechanism comprising at least one piston located on the chain saw body and causing movement essentially in the direction of the longitudinal axis of the guide rail. The end of the piston protruding beyond the body of the chain saw is in contact with the counter surface on the mounting structure, as a result of which the pressing movement of the piston causes parallel movement of the guide rail.

[0026] In accordance with the proposed solution, the chain saw body 8 is connected to the mounting structure with a special channel means 13. In addition, the channel means are provided with a cavity 14 passing through all this means (see FIGS. 6, 7 and 8), the first end of the cavity is connected to the feed channel 15 provided in the chain saw body 8, and its second end to the counter channel 16 provided in the mounting structure 9. In accordance with one of the preferred embodiments, the cavity formed in the channel means passes through The substance in the direction of the transfer element 11 is essentially passing from the chain saw body at the first end 17 to the mounting structure at the second end 18. Due to the fact that the counter channel 16 passes up to the guide bus 4, channel means 13 can be used to feed the fluid passing through the feed channel provided in the body of the chain saw through the channel means and the fixing structure to the guide rail.

[0027] Thus, for example, when lubricating a saw chain moving along a guide tire 4, the lubricant coming from a container with lubricant present in the harvester head 2 can be directed using a special pump to the guide tire through a group of channels 15-14-16. In this case, the channel for supplying lubricant from the container with lubricant to the guide tire passes through the body 8 of the chain saw, the mounting structure 9 of the guide rail and the guide rail 4 itself to the saw chain.

[0028] As shown in FIG. 6, 7, and 8, one of the ends, 18, of the channel means 13 can be attached to a counter channel 16 on the side of the fixing structure 9. In accordance with this embodiment, the channel means are arranged to move simultaneously with the movement caused by the device 11 Tension saw chain. The first end 17 of the channel means is located in a hole provided in the case 8 of the chain saw and forming the outer end of the feed channel 15, where it can slide while maintaining a sufficient tightness of the channels.

[0029] Of course, the first end 17 of the channel means 13 can also be mounted substantially fixed to the feed channel 15 on the side of the chain saw body 8. In this case, the second end 18 of the channel means, in turn, is located in the hole provided in the fixing structure 9 and forming the outer end of the response channel 16, where it can slide simultaneously with the movement caused by the tension device 11, while still maintaining sufficient tightness of the channels.

[0030] In order to achieve sufficient tightness, it is possible to select structural tolerances between the holes and the channel means so that a sufficiently gapless structure is formed. However, it would be preferable to provide channel means 13 with at least one seal 19, 20 for sealing the gap 15 or 16 between the channel means and the feed and / or return channel associated with it. As said seal, it is possible to use, for example, a sealing ring, a lip seal, or both (see, in particular, FIG. 7).

[0031] The end of the channel means 13 fixedly mounted on the chain saw body 8 or on the fastening structure 9 is provided with a means 21 for mechanically fixing the channel means in the position of connection with the feed or return channel. It is best that it is formed by thread (see, for example, Fig. 7).

[0032] The end of the channel means 13 can also be attached to the mounting structure 9 by means of a fixing screw cooperating with a groove 23 formed in the body 22 of the channel means. This alternative design is shown in FIG. 8. The resulting mechanical joint is preferably sealed separately with an o-ring. This solution allows you to create a larger gap for the mechanics of movement, corresponding to the tension of the saw chain, and, consequently, to obtain a more durable construction.

[0033] Instead of fixing the end of the channel means 13 to the chain saw body 8 or to the fixing structure 9, it is possible to provide for the execution of the channel means as an integral part of the body of the saw mechanism or the fixing structure.

[0034] It can also be provided that the ends of the feed channel 15 and / or counter channels 16 are formed not by holes, but by tubular elements projecting from the chain saw body and / or fastening structure, to the outside or inside of which the channel means are attached.

[0035] Similarly, it can be provided that the channel means 13 is a telescopically deformable means. A tool of this type can be attached at both ends, essentially motionless to both the chain saw body 8 and the fastening structure 9. When the saw chain is tensioned, the length of the channel means will be set in accordance with the distance traveled as a result of this movement, corresponding to tension, thereby maintaining fluid communication between the feed channel 15 and the response channel 16.

[0036] Instead of fixing the end of the channel means 13 to the chain saw body 8 or to the mounting structure 9, it is also possible to provide a sliding mounting of the channel means to its ends to the feed channel 15 on the side of the chain saw body, on the one hand, and to the opposite counter channel mounting designs, on the other hand. In this case, the channel means preferably contains one or more limiters to limit the length of the path of movement in the supply channel and / or the response channel. As such a limiter can be used, for example, a mechanical limiter, and preferably a shoulder in the channel means.

[0037] Similarly to the above, it is possible to select structural tolerances between the holes and the channel means in such a way that a sufficiently backlash-free design is formed, which will allow to achieve sufficient tightness. However, it is preferable to provide the channel means with at least one seal to seal the gap between the channel means and the associated feed and / or return channel. As the specified seal, you can use, for example, an o-ring, a lip seal, or both.

[0038] When using one of the particular embodiments of the chain saw 3, the channel tool 13 in question is designed to form a sliding guide that provides transfer movement between the chain saw body 8 and the guide bar 4. As a result, an effective means of reducing the weight of the chain saw is obtained.

[0039] As shown in FIG. 6, 7 and 8, the channel means 13 can be attached to the mounting structure 9 using a special counterpart 24. In this embodiment, the channel means is attached to at least one response channel 16 provided in the counter part 24, the channel being formed so that it subsequently has a message with the guide rail 4. In accordance with the preferred embodiment, the same counter piece can form the counter surface 12 of the transmission element 11. Since the longitudinal Referring duct means substantially parallel to the direction of the force created by the transfer element, it is possible to minimize the deformation force, which otherwise would be susceptible to the duct means.

[0040] It should be obvious to those skilled in the art that, due to technological progress, the basic principle of the invention can be implemented in a variety of ways, therefore the invention and its implementation options are not limited to the examples given above, but may vary within the scope of the invention defined by the claims .

Claims (14)

1. Design for supplying fluid to the guide bus (4) provided in the chain saw (3), and the chain saw further comprises at least the power unit (6), the chain sprocket (7) driven by the power unit, and a saw chain (5) which is rotatable along said guide rail, in which the guide rail (4) comprises a fastening structure (9), with which it is fastened rotatably to the chain saw body (8), and there is a tension device configured to impact n and the mounting structure of the guide rail, as a result of which it causes distant movement in the guide rail relative to the chain sprocket (7) in the direction of the longitudinal axis of the guide rail in order to tension the saw chain, and the tension device contains at least one transmission element (11) located on the body (8) of the chain saw and resulting in that the movement is essentially carried out in the direction of the longitudinal axis of the guide rail, and the transmission element is configured to contact with a counter surface (12) on the guide bar or in its mounting structure, and the mounting structure (9) of the guide bus and the body (8) of the chain saw are capable of connecting at least one supporting guide (10a, 10b) to ensure said movement of the guide rail in the direction of its longitudinal axis, characterized in that said construction further comprises channel means (13) extending from the chain saw body (8) to the fixing structure (9), so that the direction of the longitudinal axis of the channel means, essentially coincides with the direction of action of the transfer element (11), and the channel means (13) contains a cavity (14) passing through all the means, and the first end (17) of the specified channel means is configured to be connected to the feed channel (15), provided in the chain saw body, and the second end (18) of the channel means is arranged to be connected to the counter channel (16) provided in the fixing structure, the response channel extending before connecting to the guide bar, resulting in the channel means (13) and It is possible to direct the fluid passing through the delivery channel (15) provided in the body (8) of the chain saw through the channel means (13) and further to the guide tire (4) through the counter channel (16) provided in the mounting structure (9 ). 2. The construction according to claim 1, characterized in that the channel means (13) are adapted to be mounted at its first end (17), substantially fixed to the feed channel (15) on the side of the body (8) of the chain saw. 3. The construction according to claim 1 or 2, characterized in that the channel means (13) is adapted to be fixed at its second end (18) to the counter channel (16) of the fixing structure (9), and the channel means or its part is made the ability to move simultaneously with the specified transfer movement caused by the tensioning device of the saw chain. 4. A construction according to any one of the preceding claims, characterized in that the channel means (13) contains at its end a means (21) for mechanically fixing the channel means in the position of connection with the feed or return channel (15, 16). 5. The construction according to claim 4, characterized in that said means (21) for mechanically fixing the channel means (13) is preferably formed by a screw thread. 6. Design according to any one of paragraphs. 1-3, characterized in that the channel means (13) is an integral part of the body (8) of a chain saw or mounting structure (9). 7. The design according to claim 1, characterized in that the channel means (13) is made with the possibility of connection, at which sliding is possible, at its ends (17, 18) with the feed channel (15) on the side of the body (8) of the chain saw, on the one hand, and with the opposite reciprocal channel (16) of the fixing structure (9) on the other hand. 8. The design according to claim 6, characterized in that the channel means (13) contain a limiter for limiting the length of the path of movement in the feed channel (15) and / or the response channel (16). 9. The construction according to claim 7, characterized in that the limiter is, for example, a mechanical limiter, preferably a shoulder in the channel means. 10. The construction according to any one of the preceding paragraphs, characterized in that the channel means (13) contains at least one seal (19, 20) for sealing the gap between the channel means and the supply and / or response means connected to it (15, 16), and as the seal is preferably used o-ring and / or lip seal. 11. A structure according to any one of the preceding claims, characterized in that the channel means (13) are configured to form a sliding guide for the mounting structure (9) of the guide bar (4) connected to the body (8) of the chain saw. 12. Construction according to any one of the preceding paragraphs, characterized in that said construction provides for the creation of a substantially homogeneous channel (14, 15, 16) for directing lubrication from the chain saw body (8) to the saw chain (5) moving along the guide tire (4), in order to lubricate the chain. 13. Chainsaw (3) for logging machine (1), equipped with a design according to paragraphs. 1-12. 14. Forestry machine (1), containing the design on PP. 1-12 in the chain saw (3) of the harvester head (2).

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